Know anything about Rogers LS7?

I was just clearing out an old storage unit and found a set of Rogers LS7s. They look brand new. Don't know much about them or if they are worth keeping or selling. Anyone have an ideas?
Some info here:
And more here:
Beautiful speaker from the 1980s. Use a clean powered amp and good stands. Very revealing, lightly warm sounding. Box resonances can be excited easily so keep away from walls. Really for large rooms. I ran the slightly smaller 6a.